What is the programming language used at the bottom of the Linux kernel?

《What is the programming language used at the bottom of the Linux kernel? 》

In today’s technology field, the Linux kernel, as the core of an open source operating system, has received widespread attention and application. So, what is the programming language used at the bottom of the Linux kernel? In fact, the underlying Linux kernel is primarily written in C. The C language is known as one of the representatives of system programming languages. It is highly praised for its ability to directly operate memory and hardware, and to provide fine control over the bottom layer of the computer. In the development of the Linux kernel, the C language plays a vital role, providing efficient, stable and powerful underlying support for Linux.

The following uses specific code examples to demonstrate the C language programming used at the bottom of the Linux kernel:

#include <stdio.h>
#include <linux/module.h>

static int __init hello_init(void)
{
    printk(KERN_INFO "Hello, World!
");
    return 0;
}

static void __exit hello_exit(void)
{
    printk(KERN_INFO "Goodbye, World!
");
}

module_init(hello_init);
module_exit(hello_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Your Name");

The above code shows a simple Linux kernel module, which defines a module initialization functionhello_init and a module exit functionhello_exit. In the hello_init function, a message is output to the kernel log through the printk function, indicating "Hello, World!"; in the hello_exit function, the same is done through printk The function outputs another message to the kernel log, indicating "Goodbye, World!". Finally, register these two functions as the initialization and exit functions of the module through the module_init and module_exit macros, and use the MODULE_LICENSE and MODULE_AUTHOR macros Declares the module's license and author information.

Through the above code examples, we can see the characteristics of C language programming used at the bottom of the Linux kernel: simplicity and efficiency, direct operation of hardware and memory, and strong control over underlying details. Therefore, the C language programming used at the bottom of the Linux kernel provides a solid foundation for the stability and reliability of the Linux system.

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